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You mean massive amounts of money. Thanks for your views and advice. Don't want this to be a should have done this instead of, type motor like most of my sbcs.

Yes my dream motor borrowed more than few pieces from your bikes lol. Stock rpm well that's no fun haha

You mentioned lightening crankshaft. I kinda on the fence keep the rotating mass for little lower end or lighten for better top end . was considering first level lightening offered by cyclex, But i think i would stay with standard weight rotor. Also you said regulated rpm for the rods. As cyclex...

Thanks again for your time in replying Dirtdigger. I agree a fresh mill would give most hds a fit but once we shift into fourth and there is another 10 mile of straight lightly traveled road in front. With my untouched 78ss after 3rd buddy would leave me. Cams. i know the joys of running over...

The bike would be run in the 70 to 90 range. With the desire for a 140 plus rip to put the hd in its place

It will be a highway "runner"

Thanks for your insight. The reason for that big is i ride with 113hd bike n wanna easily keep up. The 73 head to keep compression up. Since you are familiar with cyclex the cam in question was their hellcat1 cam. In your opinion an 836 with the 78 head be a better cchoice.Which cam?

Thoughts. Thinking about giving cyclex a stack if money. Send them a 78 lower end 73 cylinder and head. They send me back a complete mill sporting 970ccs 12.5:1 comp. Running hard weld rockers beehive springs .4 lift cam 263 deg duration. Enlarged intake ports with 34mm carbs. I hardly see...

Hello trim. Some on here suggest that the wires inside the tach or speedo could be at fault. If you want a dirty way to find your issue wrap the fuse in foil. A spent .22 case works as well. A direct short will show up with either smoke or hot wire. Be quick on the key. Good luck

Thanks dirtdigger. It stone stock 750sohc guessing 25k miles. Too much conflicting info on the net lol. I know with my 78 ss 17/45 runs around 4300 at 60. But who goes that slow. It was much happier closer to 5000. Some say 60 at 4000 is high

Hellos Buddy working on a 74 cb750sohc chop. He wants to run a 16inch rear. Rough figuring a 10 percent size difference i suggested a 18/41 drive set. Would that be too tall of gearing

I know but i have seen it done before.

Check the tail light bulb. It should be a dual filament. PO could have stuck a single in there. The correct bulb should have two contacts on bottom

Very nice. Be nice to see the finished project

Alright. Thanks, She's sitting on blocks right now awaiting new tubes and necks bearings. So it will be awhile before i can get at the pan

Could be. though it is one digit short of the digits on neck tags

No it doesn't look like it has been ported. What would i look for in terms of rod and crank work?

If i remember the shop's name right i got two choices. A Honda dealer turned Harley dealer or a shop that specialized in building drag engines mainly for cars though i was told they did a few bike motors. I guess i will have to wait till spring to find out what it can do.

Didn't even cross that empty space between my ears to look at the end.

The story. Dude bought motor, six years ago, off guy at swap meet. He was told it was a recent rebuild stroked to 880 done by out of province shop. Dude bought motor for a project bike he and brother were working on the brother passed away project didn't get finished. So dude never rode the bike...

Motor looks just like my older k motor. Head is the same on the intake and exhaust as well. the old round tops fit. Runs good so no dismantling yet. Had valve cover off think it had R5 cast in cam. My 78 super sport had an R1 and the other had R5 or R3

it is a sohc

pic of the pad

Hi dirtdigger. pics of what? The numbers look hand stamped and the pad has the same pebbled look and depth as my other two cb750 motors. Twas thinking it may be a replacement case?? i will see if i can get yous a pic of the numbers

Hello. i recently purchased an cb750 told it was stroked out to 880. Research suggests it is not. But the real question is the serial number on the case. The pad has not been altered. The number is IDA2988another digit. In my limited research i have not found anything like this. What gives? Yes...